<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Test Upload a File</title>
</head>
<body>
    <form enctype="multipart/form-data" action="http://127.0.0.1:9000/upload/ddd" method="post">
        {{/* 1. File input */}}
        <input type="file" name="file" />

        {{/* 2. Submit button */}}
        <input type="submit" value="upload file" />
    </form>
</body>
</html>